Sandwich, IL Area Codes
Sandwich, Illinois (population 7,380) uses area codes 779 and 815.
Carriers with Sandwich numbers
6 prefixes are assigned to the Sandwich exchange: 33% mobile, 33% VoIP and cable, 33% landline.
| Carrier | Prefixes |
|---|---|
| Frontier | 2 |
| Peerless Network | 1 |
| Verizon Wireless | 1 |
| UScellular | 1 |
| Lumen (Level 3) | 1 |
Area codes used in Sandwich
| Area code | Prefixes serving Sandwich | Main carriers in this code |
|---|---|---|
| 779 | 4 | Onvoy (Sinch), AT&T Mobility, Stratus Networks |
| 815 | 2 | Frontier, AT&T (Illinois Bell), Lumen (Level 3) |
Sandwich phone number prefixes
Numbers starting with these first six digits were originally assigned to the Sandwich exchange.
779-209Peerless Network779-706Verizon Wireless779-931Frontier779-978UScellular815-570Lumen (Level 3)815-786Frontier
Nearby cities in area code 779
- Joliet
- Rockford
- Plainfield
- Crystal Lake
- DeKalb
- McHenry
- New Lenox
- Lockport
- Woodstock
- Belvidere
- Homer Glen
- Loves Park
Questions
- What is the area code for Sandwich, IL?
- Sandwich uses 2 area codes: 779 and 815. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
- What time zone is Sandwich in?
- Sandwich is in the Central time zone.